Question

A train is travelling away from you at 120 km/h. The train blows its 400-Hz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?

Answer 1

Answer:364 Hz

Explanation: By Doppler's Effect

f = $\frac{V+V_{s} }{V+V_{O} }$ f

Input Values with sign

Vo is velocity of observer

Vs is velocity of source

Answer 2

Answer:my ans is 364.28 let me know if its not write

Explanation:

Just use doppler effect